She wears booty shorts in the house

So, the last time my BIL and his GF stayed at our house (for about 4 days) she was walking around in tight booty shorts and her ass cheeks were out. I’m not a hater or insecure but I’m speaking out of respect. When we go visit them and stay with them I’m not bringing my tiny shorts, I’m bringing normal shorts or pajamas but it’s morning time and she stays in her sleepwear all morning and afternoon. Like I said, I’m not being insecure and maybe she’s just comfortable but it’s weird bc we have kids in the house. And family coming over for breakfast and she doesn’t change nor my BIl tells her to cover up. Now they’re staying with us next weekend and most likely she’ll be in booty shorts again. Personally, if I’m staying at family’s house. I’m not about to be in booty shorts for my husband’s brother and all the kids to see my ass cheeks. Especially not in front of his parents during breakfast. It’s a self respecting thing. And I’ve been around my husband’s family for 10+ years. I’ve never been that comfortable to be in booty shorts during family breakfast. Literally her ass is all out and we have kids in the house.